Classification: pf_cenozoic -> Truncorotaloididae -> Astrorotalia
Sister taxa: Alicantina, Acarinina, Praemurica, Igorina, Pearsonites, Planorotalites, Astrorotalia, Morozovella, Morozovelloides,
Daughter taxa: (blue => in age window 0-800Ma)
This form is uniquely distinguished by the peripheral keel extending into blade-like keel-spines on each chamber.
Specimens which cannot be assigned to established species


Citation: Astrorotalia Turnovsky, 1958
Rank: Genus
Type species: Globorotalia palmerae Cushman and Bermúdez, 1937

Catalog entries: Astrorotalia

Distinguishing features: Low trochospiral test with keel-spines

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.


Diagnostic characters: This monospecific genus is easily recognized by the peripheral keel that extends into blade-like projections (which we call ‘keel-spines’ as distinct from the hollow tubulospines of Hantkenina) at the midpoint of each chamber in the ultimate whorl. In contrast to similar morphologic taxa such as the benthic foraminifer Pararotalia, the genus has a normal perforate wall with short coalescing pustulose ridges surrounding the pores, thus producing a roughened or cancellate-like appearance in the adult and terminal stages. [Berggren et al. 2006]

Biogeography and Palaeobiology

Geographic distribution:

Isotope paleobiology:

Phylogenetic relations:

Similar species:

Most likely ancestor: Planorotalites - at confidence level 0 (out of 5). Data source: Berggren et al. 2006.

Biostratigraphic distribution

Geological Range:
Last occurrence (top): in lower part of Lutetian Stage (32% up, 45.7Ma, in Lutetian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Ypresian Stage (71% up, 50.2Ma, in Ypresian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Primary source for this page: Berggren et al. 2006 - Eocene Atlas, chap. 12, p. 379


Berggren, W. A., Olsson, R. K. & Premoli Silva, I. (2006a). Taxonomy, biostratigraphy and phylogenetic affinities of Eocene Astrorotalia, Igorina, Planorotalites, and Problematica (Praemurica? lozanoi). In, Pearson, P. N. , Olsson, R. K. , Hemleben, C. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 12): 377-400. gs V O

Bermudez, P. J. (1937). Nuevas especies de Foraminiferos del Eoceno de Cuba. Memorias de la Sociedad Cubana de Historia Natural. 11: +143-+. gs

Turnovsky, K. (1958). Eine neue Art von Globorotalia Cushman aus dem Eozaen Anatoliens und ihre Zuordnung su einer neuen Untergattung. Bulletin of the Geological Society of Turkey. 6(2): 80-86. gs


Astrorotalia compiled by the pforams@mikrotax project team viewed: 24-9-2020

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